152 NEW YORK STATE MUSEUM 



19. Ablabesmyia indecisa Williston 

 1890 T a u y V ^1 « ^Vill. Trans. Eiit. Soe. Ix)iid. p.27G 

 (P1.27, figs. 12 and 13) 

 Male and female. AMngs hairy; posterior forked cell not petio- 

 late; front metatarsi shorter tlian their tibiae. Head and basal 

 joint of the antennae reddish yellow; palpi and the remainder of 

 the antennae brownish yellow; antennal jilnmosity of the 

 male gray, towards the tip blackish. Thorax reddish yellow; 

 bare, opaque, with three slender, reddish brown stripes in front, 

 separated by ashy intervals; on each side ])Osteriorly with an 

 elongate In-own sjjot. the middk^ of which is ashy; scntelhim light 

 yellow; metanotnm brownish red. Abdomen slender; opaqne 

 brown, the jiosterior angles and borders of the segments ashy; 

 the yellow of the venter sometimes encroaches upon the (brown 

 of the dorsmn ; sixth and seventh seg^nents more distinctly yel- 

 low; the seventh and eighth segments with the posterior jtortion 

 blackish. Legs yellow, less hairy than in A. f 1 a v e o 1 a . Wings 

 hyaline, moderately hairy. Length 1.5 to 2.-5 mm. St Vincent 

 Island, 



I ba\e com'i)ared my male sjiecimens with the cotyj)e male speci- 

 men from the St Vincent collection of Cornell university, and 

 cannot detect any differences. 



Var. a. (fig.12). Male and female; agrees with >\'illiston's de- 

 scription, excepting that there are Ibut two reddish brown stripes 

 in front (i.e. the usnal middle sti-ijie with a very slender dividing 

 line) ; and all the abdominal segments are marked alike with ashy 

 borders. 



To Williston's description of the normal species the following 

 may be added : The brown of each segment of the abdomen more 

 intense just in front of the ashy posterior margin. Tlu^ abdomen 

 of the female is reddish brown, the incisures yellow and the mar- 

 gins of the segments ashy. Specimens from Ithaca, N. Y., and 

 Pennsylvania. 



20. Ablabesmyia pilosella Loew 

 ISCiCt 'l'any]»us Locw. Bcrl. Ent. Zeit. ]•.."> 



Female. Teslaceons or suibfnscons, with pah; pile, the dorsum 

 of the thorax without stripes, the scntelhim, legs and antennae 

 very pale, the last with long j)ile and toward the tip blackish, the 

 wings thickly ])ilose, subiciner(H)ns, the basal cells short. Length 

 1 mm. Wing L2 to L.'? mm. 



Snuill, opacpie, testaceous or subfuscons. The antennae ordi- 

 nary, i)ale, blackish towards the ti]), clothed with very long pile, 

 the last joint not thickened. The dorsum of the thorax without 



